Multifunction security gate

A functional description of multifunction security gate circuit is mainly emitted by the infrared encoder circuit (infrared radiation plate) and infrared (decoding) receiver circuit, the control section and each unit circuit. Encoding and decoding chips were used PT2262-IR and PT2272-M4, transmitting and receiving address code setting must be identical for paired. Infrared transmitter circuit coded address code, data code, synchronization code along with 38KHz IR carrier launch go out; a receiving circuit receives a valid signal, after decoding, post-processing into the required electrical signal (when the signal sent from the received When, VT pin output decoder chip PT2272-M4 is a positive pulse at the same time, the corresponding data pin output high), the control waveform generating alarm op amp circuit, sound and light control lamp circuit, metal detection alarm circuit switch Several door indicating circuit unit circuit.

Second, the circuit Introduction transmitting infrared emission panel IR signals coded infrared transmitter circuit by pressing different keys (K1, K2, K3, K4) board after receiving the appropriate signal, the corresponding function: Press K1 keyboard: switch door indicates circuit status indication LEDs LED5 and LED6 door: The door opened on behalf of green light, red light on behalf of the door is closed. Press K2 keyboard: metal detection alarm circuit, there is no real-time detection of metal, if the metal music alarm is issued. Press K2 keyboard again to clear the alarm. Press K3 Keyboard: vibration detection alarm circuit, there is no real-time detection of vibration, if vibration control circuit to the op amp power supply waveform generating alarm circuit alarm. Press K3 keyboard again to clear the alarm. Press K4 Keyboard: LED2 lights and light control delay period of time analog gate lights off. Sound and light control lamp circuit can also be controlled LED2 light off, but only in the case of light and dark can pass voice control LED2 lights. In addition, by pressing the control part of the circuit K4, K3, K2, K1, the correspondence can also achieve the same functionality.

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